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/*
* sb_efuncs.c
*
* Helpers for doing pretty output.
*
* Copyright 1999-2012 Gentoo Foundation
* Licensed under the GPL-2
*/
#include "headers.h"
#include "sbutil.h"
const char *colors[] = {
"\033[0m",
"\033[32;01m",
"\033[33;01m",
"\033[31;01m",
};
__attribute__((constructor))
static void sbio_init(void)
{
if (is_env_on(ENV_NOCOLOR)) {
size_t i;
for (i = 0; i < ARRAY_SIZE(colors); ++i)
colors[i] = "";
}
}
/*
* First try to write to the known good message log location (which is
* normally tied to the initial sandbox's stderr). If that fails, fall
* back to writing to /dev/tty. While this might annoy some people,
* using stderr will break tests that try to validate output. #261957
* Other related bugs on the topic: #278761
*/
static void sb_vefunc(const char *prog, const char *color, const char *format, va_list args)
{
int fd;
FILE *fp;
if (likely(sbio_message_path))
fd = sbio_open(sbio_message_path, O_WRONLY|O_APPEND|O_CLOEXEC, 0);
else
fd = -1;
if (fd == -1)
fd = sbio_open(sbio_fallback_path, O_WRONLY|O_CLOEXEC, 0);
fp = fd == -1 ? NULL : fdopen(fd, "ae");
if (!fp)
fp = stderr;
sb_fprintf(fp, " %s*%s ", color, COLOR_NORMAL);
sb_vfprintf(fp, format, args);
if (fp != stderr)
fclose(fp);
}
void sb_einfo(const char *format, ...)
{
va_list args;
va_start(args, format);
sb_vefunc("einfo", COLOR_GREEN, format, args);
va_end(args);
}
void sb_debug_dyn(const char *format, ...)
{
if (!is_env_on(ENV_SANDBOX_DEBUG))
return;
va_list args;
va_start(args, format);
sb_vefunc("einfo", COLOR_GREEN, format, args);
va_end(args);
}
void sb_ewarn(const char *format, ...)
{
va_list args;
va_start(args, format);
sb_vefunc("ewarn", COLOR_YELLOW, format, args);
va_end(args);
}
void sb_eerror(const char *format, ...)
{
va_list args;
va_start(args, format);
sb_vefunc("eerror", COLOR_RED, format, args);
va_end(args);
}
void sb_eqawarn(const char *format, ...)
{
va_list args;
va_start(args, format);
sb_vefunc("eqawarn", COLOR_YELLOW, format, args);
va_end(args);
}
void sb_dump_backtrace(void)
{
#ifdef HAVE_BACKTRACE
void *funcs[10];
int num_funcs;
num_funcs = backtrace(funcs, ARRAY_SIZE(funcs));
backtrace_symbols_fd(funcs, num_funcs, STDERR_FILENO);
#endif
__sb_dump_backtrace();
}
void __sb_ebort(const char *file, const char *func, size_t line_num, const char *format, ...)
{
va_list args;
sb_eerror("%s:%s():%zu: failure (%s):\n", file, func, line_num, strerror(errno));
va_start(args, format);
sb_vefunc("eerror", COLOR_RED, format, args);
va_end(args);
sb_dump_backtrace();
sb_maybe_gdb();
abort();
}
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